“西格玛”的核心思想是利用统计手段，改善日常作业流程，提高顾客满意度，提升企业效率。

用所给动词的适当形式填空。

1. What are you ______ (do) now?

2. You must ______ (wash) your clothes by yourself.

3. How many ______ (present) did you receive last year?

4. There are many ______ (visit) are there in Beijing every year?

5. My mother asks me ______ (know) about more about traditional life

最大量程是150V的1.5级电压表的读数是100V，问标准值可能在那个范围内？

玉米在全球粮食产量排第（）位。

A.一

B.二

C.三

D.四

要素饮食的供给方法有哪几种？

“越权理论”